mifareauth.py 文件源码

def __write_block(self, block, data):
        """Writes a block of data to a Mifare Card after authentication

           Raises an exception on error
        """
        if nfc.nfc_device_set_property_bool(self.__device, nfc.NP_EASY_FRAMING, True) < 0:
            raise Exception("Error setting Easy Framing property")
        if len(data) > 16:
            raise ValueError("Data value to be written cannot be more than 16 characters.")
        abttx = (ctypes.c_uint8 * 18)()
        abttx[0] = self.MC_WRITE
        abttx[1] = block
        abtrx = (ctypes.c_uint8 * 250)()
        for i in range(16):
            abttx[i + 2] = ord((data + "\x00" * (16 - len(data)))[i])
        return nfc.nfc_initiator_transceive_bytes(self.__device, ctypes.pointer(abttx), len(abttx),
                                                  ctypes.pointer(abtrx), len(abtrx), 0)